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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Vishay General Semiconductor - Diodes Division 1.5KA13HE3/73

Name: 1.5KA13HE3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: 1.5KA13HE3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1.5KA13HE3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-201AA, DO-27, Axial

Datasheet:: 1.5KA13HE3/73.pdf

Description:: TVS DIODE 10.5VWM 19VC 1.5KA

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Product details

Overview

1.5KA13HE3/73 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode in the 1.5KA case style, rated for 1500 W peak pulse power (10/1000 µs), 11.7–14.3 V breakdown voltage (V_BR), and 185 °C maximum junction temperature. It provides clamping at 19.0 V under 78.9 A peak pulse current and is AEC-Q101 qualified for engine control units and powertrain electronics.

For engineers reviewing the 1.5KA13HE3/73 datasheet, 1.5KA13HE3/73 pinout, 1.5KA13HE3/73 application, or 1.5KA13HE3/73 equivalent, key selection criteria include its 10.5 V stand-off voltage (V_WM), 2.0 µA max reverse leakage at V_WM, 19.0 V clamping voltage at IPPM, 0.081 %/°C V_BR tempco, and RoHS-compliant HE3 suffix meeting JESD201 Class 2 whisker resistance.

Technical Context

This TVS diode uses patented PAR® construction for high reliability under automotive thermal cycling and surge stress. Its unidirectional polarity enables robust protection of DC power rails and signal lines against inductive switching transients and load dump events.

Designed for operation from –65 °C to +185 °C, it maintains stable clamping performance across temperature with low incremental surge resistance and fast response time-critical for safeguarding MOSFETs and microcontrollers in harsh environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BR (min/max)	11.7 V / 14.3 V - defines minimum voltage at which device enters avalanche conduction; ensures reliable triggering above system operating voltage
V_WM	10.5 V - maximum continuous reverse working voltage; sets upper limit for safe DC bias without leakage degradation
V_C @ I_PPM	19.0 V - clamping voltage during 78.9 A 10/1000 µs surge; determines peak stress on protected downstream ICs
P_PPM	1500 W - peak pulse power handling capability; supports high-energy transients per ISO 7637-2 Pulse 5a
T_J max.	+185 °C - extended junction temperature rating; enables placement near hot components like power MOSFETs or ignition coils
Tempco of V_BR	0.081 %/°C - quantifies voltage drift with temperature; critical for precision clamping in wide-temperature automotive applications

Pinout & Package

Package: Case Style 1.5KA - axial-leaded, molded epoxy body with UL 94 V-0 rating, matte tin-plated leads compliant with J-STD-002 and JESD22-B102, cathode indicated by color band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point in forward bias; connected to ground or lower-potential rail in unidirectional TVS configuration	Enables standard cathode-to-rail placement for power rail protection; requires correct orientation to avoid short-circuit failure
Cathode	Current exit point in forward bias; connected to protected line (e.g., 12 V battery rail or sensor supply)	Defines clamping direction: reverse-biased during overvoltage; must be routed to highest potential node in protected circuit

Key Features

Feature	Design Value
Patented PAR® construction	Eliminates bond wire interconnects to reduce inductance and improve surge current distribution across the die
AEC-Q101 qualification	Validated for automotive underhood use including temperature cycling, humidity, and mechanical shock per test requirements
1500 W peak pulse power (10/1000 µs)	Withstands ISO 7637-2 Load Dump and Pulse 5a transients without degradation in engine control modules
HE3 suffix compliance	Meets JESD201 Class 2 whisker resistance, ensuring long-term solder joint integrity in high-reliability assemblies
Low clamping ratio (V_C/V_BR ≈ 1.35)	Minimizes overvoltage overshoot during surge events, reducing stress on sensitive 12 V logic interfaces

Applications

Engine Control Unit (ECU) Power Protection	Automotive Sensor Signal Line Protection
Use Scenario: Protects 12 V supply rail in engine control units against load dump transients up to 40 V and 100 ms duration. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and main regulator input to clamp surges before they reach PMIC and MCU. Use Value: Clamps to 19.0 V at 78.9 A, limiting stress on downstream 36 V-rated regulators and preventing latch-up in 5 V/3.3 V domain controllers.	Use Scenario: Shields analog output lines of pressure or temperature sensors from ESD and inductive switching noise in chassis modules. IC Role / Device Role / Timing Role: Low-capacitance TVS installed at connector interface to absorb sub-100 ns ESD pulses while preserving signal integrity. Use Value: 2.0 µA leakage at 10.5 V ensures minimal impact on 4–20 mA loop accuracy; fast response prevents sensor ADC saturation.
Body Control Module (BCM) CAN Bus Protection	Start-Stop System Battery Interface
Use Scenario: Guards CAN_H/CAN_L differential pair inputs in BCM against coupled transients from adjacent high-current solenoid drivers. IC Role / Device Role / Timing Role: Dual TVS array (one per line) referenced to local ground, leveraging unidirectional behavior for asymmetric rail protection. Use Value: 19.0 V clamping prevents CAN transceiver damage during 12 V rail disturbances; AEC-Q101 rating ensures longevity in cyclic start-stop duty.	Use Scenario: Installed at battery terminal interface of start-stop systems to absorb regenerative braking spikes and alternator load dump. IC Role / Device Role / Timing Role: Primary front-end TVS on main 12 V bus, sized to handle 1500 W surges without thermal runaway. Use Value: 185 °C T_J max enables direct mounting on high-current bus bars; 0.081 %/°C tempco maintains clamping stability across cold crank to hot idle conditions.

Engine Control Unit (ECU) Power Protection

Automotive Sensor Signal Line Protection

Use Scenario: Protects 12 V supply rail in engine control units against load dump transients up to 40 V and 100 ms duration.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and main regulator input to clamp surges before they reach PMIC and MCU.

Use Value: Clamps to 19.0 V at 78.9 A, limiting stress on downstream 36 V-rated regulators and preventing latch-up in 5 V/3.3 V domain controllers.

Use Scenario: Shields analog output lines of pressure or temperature sensors from ESD and inductive switching noise in chassis modules.

IC Role / Device Role / Timing Role: Low-capacitance TVS installed at connector interface to absorb sub-100 ns ESD pulses while preserving signal integrity.

Use Value: 2.0 µA leakage at 10.5 V ensures minimal impact on 4–20 mA loop accuracy; fast response prevents sensor ADC saturation.

Body Control Module (BCM) CAN Bus Protection

Start-Stop System Battery Interface

Use Scenario: Guards CAN_H/CAN_L differential pair inputs in BCM against coupled transients from adjacent high-current solenoid drivers.

IC Role / Device Role / Timing Role: Dual TVS array (one per line) referenced to local ground, leveraging unidirectional behavior for asymmetric rail protection.

Use Value: 19.0 V clamping prevents CAN transceiver damage during 12 V rail disturbances; AEC-Q101 rating ensures longevity in cyclic start-stop duty.

Use Scenario: Installed at battery terminal interface of start-stop systems to absorb regenerative braking spikes and alternator load dump.

IC Role / Device Role / Timing Role: Primary front-end TVS on main 12 V bus, sized to handle 1500 W surges without thermal runaway.

Use Value: 185 °C T_J max enables direct mounting on high-current bus bars; 0.081 %/°C tempco maintains clamping stability across cold crank to hot idle conditions.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ13A-E3/52	600 W P_PPM, 13.0–14.4 V V_BR, DO-214AA package, bidirectional option available	Limited to lower-energy transients; not AEC-Q101 qualified; suited for non-automotive industrial use	Select when cost sensitivity outweighs automotive qualification and 1500 W surge margin is unnecessary
1.5KE13A	Same V_BR range but 1500 W P_PPM in DO-201 package; no HE3 whisker rating; TJ max = 175 °C	Lower thermal robustness; lacks automotive-specific process controls and testing; used in legacy consumer/industrial designs	Choose only if existing PCB layout uses DO-201 footprint and AEC-Q101 compliance is not required

Compared with SMBJ13A-E3/52 and 1.5KE13A, the 1.5KA13HE3/73 delivers higher surge endurance, guaranteed automotive qualification, and superior whisker resistance-making it the sole choice for new AEC-Q101–compliant powertrain and chassis designs requiring 1500 W clamping.

Availability

1.5KA13HE3/73 is available at Aetrix Electronics and suitable for engine control units, body control modules, start-stop battery interfaces, and automotive sensor signal conditioning requiring stable component supply across extended temperature and high-reliability production cycles.

Supply support for 1.5KA13HE3/73 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.

The 1.5KA series was engineered specifically for AEC-Q101–compliant automotive power rail and signal line protection, emphasizing thermal stability, surge robustness, and long-term whisker resistance in underhood environments.

FAQ

What is the clamping voltage of the 1.5KA13HE3/73 under maximum rated surge current?

The 1.5KA13HE3/73 has a maximum clamping voltage (V_C) of 19.0 V when subjected to its rated peak pulse current (I_PPM) of 78.9 A using the standard 10/1000 µs waveform. This value is measured at T_A = 25 °C and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5KA13HE3/73 maintains this clamping performance across its full operating temperature range due to its low 0.081 %/°C V_BR temperature coefficient.

Is the 1.5KA13HE3/73 suitable for bidirectional transient protection?

No, the 1.5KA13HE3/73 is a unidirectional TVS diode and is not designed for bidirectional protection. Its electrical characteristics-including breakdown voltage, clamping behavior, and polarity marking-are specified only for reverse-bias operation. For applications requiring symmetrical clamping (e.g., AC lines or differential buses), a dedicated bidirectional variant such as the 1.5KA13AHE3/73 must be selected. The 1.5KA13HE3/73 data sheet explicitly states "Available in uni-directional polarity only."

What does the HE3 suffix indicate on the 1.5KA13HE3/73?

The HE3 suffix on the 1.5KA13HE3/73 denotes a RoHS-compliant, high-reliability automotive-grade version that meets JESD201 Class 2 whisker resistance requirements and is qualified to AEC-Q101. It features matte tin-plated leads solderable per J-STD-002 and JESD22-B102, and is intended for mission-critical automotive applications where long-term interconnect integrity is essential. The 1.5KA13HE3/73 is not interchangeable with non-HE3 variants in AEC-Q101–mandated designs.

How does the 1.5KA13HE3/73 perform at elevated junction temperatures?

The 1.5KA13HE3/73 is rated for operation up to +185 °C junction temperature and exhibits derated pulse power capability above T_A = 25 °C per Figure 2 in its datasheet (Document Number 88300). Its V_BR shifts predictably with temperature (+0.081 %/°C), enabling stable clamping design across automotive ambient ranges. At T_J = 150 °C, reverse leakage remains ≤10 µA at V_WM, confirming suitability for underhood placement near power electronics. The 1.5KA13HE3/73 maintains full AEC-Q101 compliance across this range.

Can the 1.5KA13HE3/73 replace older 1.5KE13A parts in existing designs?

The 1.5KA13HE3/73 is not a direct drop-in replacement for 1.5KE13A due to differences in package (1.5KA vs. DO-201), lead finish (HE3 whisker-resistant tin vs. standard tin), and qualification (AEC-Q101 vs. commercial grade). While both share similar V_BR and P_PPM, the 1.5KA13HE3/73 requires PCB layout adaptation for its axial 1.5KA case and offers enhanced thermal and reliability performance. Redesign validation is required before substituting the 1.5KA13HE3/73 into legacy 1.5KE13A footprints.

1.5KA13HE3/73 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Package/Case:: DO-201AA, DO-27, Axial

Series:: PAR®

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 10.5V

Voltage - Breakdown (Min):: 11.7V

Voltage - Clamping (Max) @ Ipp:: 19V

Current - Peak Pulse (10/1000µs):: 78.9A

Power - Peak Pulse:: 1500W (1.5kW)

Power Line Protection:: No

Applications:: -

Capacitance @ Frequency:: -

Operating Temperature:: -65°C ~ 185°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Through Hole

Supplier Device Package:: 1.5KA

1.5KA13HE3/73 FAQ

1.How can I place an order for 1.5KA13HE3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1.5KA13HE3/73 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 1.5KA13HE3/73 reliable?

The price and inventory of 1.5KA13HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA13HE3/73 is usually 5 days.

3.What payment methods are accepted for 1.5KA13HE3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA13HE3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1.5KA13HE3/73?

1.5KA13HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1.5KA13HE3/73 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 1.5KA13HE3/73?

For technical support, including 1.5KA13HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA13HE3/73 requirements.

6.How does Aetrix verify that 1.5KA13HE3/73 is sourced from the original manufacturer or authorized distributors?

All 1.5KA13HE3/73 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1.5KA13HE3/73 meets industry standards.

7.What is the process for return or replacement of 1.5KA13HE3/73?

All 1.5KA13HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA13HE3/73, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 1.5KA13HE3/73 part is unused and in its original packaging.

Return procedure for 1.5KA13HE3/73:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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